The present invention is directed to a device for delivering a sealant to a tissue, comprising a sealant compartment, a cooling gas compartment, and a heater, all disposed inside a unified housing; with heater configured for rendering the sealant liquid or semi-liquid or molten and flowable; with sealant compartment configured for expressing the sealant in a flowable form from device via an exit nozzle; with gas compartment configured for expressing a cooling gas via a gas expression port; with exit nozzle and gas expression port co-directed into the same direction.